It will be a little cold and dry in October. The temperature differs much between day and night. You should wear warmly.Be sure to bring a sweater and trench coat.

hi there
i warmly welcome come to xinjiang .
weather of xinjiang not so bad in October but in mountainring area bit cold ,day and night have differns so you must take sleeping bag and bring cloth for in case

hi you welcome , some of my friend give you very good advice like me ,Urimqi bit cold at the time but other city not bad .
sleeping bag and tent most important for that

Dear
October is good time for visiting xinjiang you will see beatifull yelow color puplear tree. 18-22 degree a day, 5-10 at night ( (my colleague from Sweden told not very much different form Sweden ) mountain will be different take some more clothes
have nice journey.
Regards